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AJAX is the buzz-word of the moment to web developers. It's a buzz-word that is hotly debated from many angles, but it has stuck as a buzz-word because it encapsulates something that is new from a user's perspective. The functionally that is newly available to all web users is "in-page replacement" - the ability for a web page to change using data from a web server without totally redrawing itself. This functionality has been around in Mozilla and Internet Explorer for a while, but it is only recently that Safari and Konqueror users have been able to join in.

Ajax, which stands for Asynchronous JavaScript and XML, is transforming the Web and Internet-based applications forever. The initial user interaction model of the Web is based on page-oriented HyperText Markup Language (HTML). It is designed to display text and graphic information easily in a web browser. Its simple publication and viewing model has helped fuel the explosive adoption of the World Wide Web into the global phenomenon we know today. But this growth has users wanting more; they want web applications to provide desktop-like user experiences, and HTML's page-oriented model falls short.

Ajax substantially improves the end user experience for web-based applications and provides a new user interaction model. In more technical terms, Ajax is a development technique in which Web pages act more like desktop applications because the page does not have to be reloaded on each user input. Instead of repeated page refreshes, small amounts of data are exchanged with the server behind the scenes and the application remains usable by the end-user.

Ajax technology has emerged as a critical technology for launching the Web's next generation, often referred to as Web 2.0. Ajax is increasing end user productivity and enabling new classes of collaboratory applications. In short, Ajax is redefining the Web at a rapid pace, thus requiring every organization with a Web presence or Internet-based business applications to develop a cohesive Ajax strategy.